阿拉伯數字轉中文（漢字）數字

/**
 * 數字工具類型
 * @author rubekid
 *
 */
public class NumberUtils {
    private final static String[] GROUP_UNITS = {"", "萬", "億", "兆"};
    private final static String[] BASE_UNITS = { "", "十", "百", "千" };
    private final static char[] SIMPLIFIED_NUMBERIC = { '零', '一', '二', '三', '四', '五', '六', '七', '八', '九' };
    private final static char[] TRADITIONAL_NUMBERIC = { '零', '壹', '貳', '叄', '肆', '伍', '陸', '柒', '捌', '玖' };
    
    /**
     * 轉為中文數字
     * @param number 數值
     * @param isTraditional 是否轉為繁體
     * @return
     */
    public static String toChinese(long number, boolean isTraditional){
        char[] numberic = isTraditional ? TRADITIONAL_NUMBERIC : SIMPLIFIED_NUMBERIC;
        
        if(number==0){//判斷是否為0
            return String.valueOf(numberic[0]);
        }
        
        String str = String.valueOf(number);
        char[] numbers = str.toCharArray();
        int len = str.length();
        //統計連續出現的0
        int zeroCount = 0;
        
        StringBuffer stringBuffer = new StringBuffer();
        for(int i = 0; i<len ;i++){
            int value = Integer.parseInt(String.valueOf(numbers[i]));
            int index = len - i - 1;
            //在分組中的下標
            int _index  = index % 4;
            if(value == 0){
                zeroCount++;
                if((_index == 0 && zeroCount < 4 ) || (index % 8 == 0 && zeroCount < 8)){
                    stringBuffer.append(getGroupUnit(index));
                    zeroCount = 0;
                }
            }
            else{
                if(zeroCount > 0){
                    stringBuffer.append(numberic[0]);
                }
                if(_index == 0){
                    stringBuffer.append(numberic[value] + BASE_UNITS[_index] + getGroupUnit(index));
                    zeroCount = 0;
                }
                else{
                    //調整以“一十”開頭的不需要出現“一” 如：100000 讀“十萬”而不是“一十萬”
                    if(_index == 1 && i==0 && value== 1){
                        stringBuffer.append(BASE_UNITS[_index]);
                    }
                    else{
                        stringBuffer.append(numberic[value] + BASE_UNITS[_index]);
                    }
                    
                }
                zeroCount = 0;
            }
            
        }
        return stringBuffer.toString();
    }
    
    /**
     * 轉為中文數字
     * @param number 數值
     * @return
     */
    public static String toChinese(long number){
        return toChinese(number, false);
    }
    
    /**
     * 轉為中文數字
     * @param number 數值
     * @param isTraditional 是否轉為繁體
     */
    public static String toChinese(int number, boolean isTraditional){
        return toChinese((long)number, isTraditional);
    }
    
    
    /**
     * 轉為中文數字
     * @param number 數值
     */
    public static String toChinese(int number){
        return toChinese(number, false);
    }
    
    /**
     * 獲取分組單位 
     * @param index
     * @return
     */
    private static String getGroupUnit(int index){
        String groupUnit = GROUP_UNITS[(index / 4) % 2];
        if(index % 8 == 0 && index > 0){
            groupUnit += GROUP_UNITS[(index / 8) +1];
        }
        return groupUnit;
    }
}